Water bodies play a vital role in both the ecology and the local economy of the Lawngtlai district.
* **Chhimtuipui (Kaladan River):** The most significant river flowing through the district. It is the focal point of the Kaladan Multi-Modal Transit Transport Project, intended to connect northeastern India to the sea via Myanmar. * **Ngengpui River:** A notable tributary flowing near the wildlife sanctuary, providing water resources and supporting local aquatic life. * **Tuipui River:** Another key river system in the region, offering scenic spots and serving as a traditional fishing ground for locals.